Improvement in hoisting appaeatus



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@te dgctult nient tu it tlgtst tttcts gatcnt imt'nmliing @att tt tigtsame.

To ALL WHoM Ir MAY coNcEnN:

Be it known that I, J. F. ROCHOW, of No. 213 East Broadway, in the city,county, and State of New York, have invented a new and improved HoistingApparatus :1nd Power-Gear; and I do hereby declare that the following isa full, clear,` and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference-being had to theaccompanying drawing forming part of this specification, in which-Figure 1 represents' a longitudinal central section of this invention,the line a: a', fig. 2, indicating the plane of section. Y

Figure 2 is a transverse vertical section of the same, the plane ofsection being indicated by the lineyy, fig. 1r

The remaining figures are modifications of the same, showing itsapplication to diiferent machines, which will be referred to as thedescription progresses.

Similar letters of reference in these views indicate correspondingparts.

This invention consists inl the arrangement of acrank-shaft, on thewrist-pin of which are mounted loosely two cog-wheels or pinions, whichare secured to or cast solid with one and the same hub. One of thesepinions meshes in 4an internal gear, which is either rigidlyconnected'with the frame of the apparatus, or so arranged that it can beheld stationary while the second pinion meshes in a gear in the interiorof a rotary drum, and the proportion of' these pinions and theirrespective gears is so adjusted that by imparting a revolving motion tothe crank-shaft a slow and powerful motion is imparted to the'drum, andahoisting apparatus is obtained which is very compact, strong, dura-ble,andfapplicable to a greatanany different purposes. Y

A represents a frame, of cast iron, or any other suitable materiah-andprovided with boxes B, which form the bearings for the gudgeons of thedrum D. One ofthese gudgeons is boredout to receive the shaft C, I

while the other gudgeon is bored out to lit upon the hub of thestationarygcar E, which hub is bored out to admit the shaft C, asclearly shown in tig. 1 of the drawing. The stationary gear. E is heldin position by a gland, F, which is secured to the frame A by screws 'orin any other suitable manner, and in which the hub of said stationarygear is fastened by a key or any other suitable means. The shaft C isprovided with av crank, G, and on the wrist-pin of this crank aremounted two pinions', HI, which'are rigidly secured to or cast solidwith one andthe samehub, J, that turns loosely on the w1ist-pin of thecrank. The pinion 4I meshes into the coge of the internal geariE, andthe. pinion H into an internal gear, K, on the inner surface of the drumD. On the outer circumference of this drum winds the hoisting-rope orchain.- The proportion of the pinion I to the sta tionary gear E isdifferent from the proportion of the pinion H to the internal gearK.

The operation is as follows: If the pinion I has eight cogs, thestationary gear fteen, the pinion H ten, and theinternal gear Keighteen, and if a revolving motion is imparted to the shaft C, eachrevolution of-said shaft produces g5 revolutions ofthe pinion I, andsince this pinion is rigidly corinected to the pinion H, this pinionalso makes 1g? revolutions, or, in other 'words, it advances g5 10=18cogs. If the proportion were such that the pinion H-would advance onlyeighteen cogs, the drum D'would remain stationary; but since said pinionadvances eighteen and three-fourths cog's,the drum has to advancethree-fourths of a cog for each revolution of the shaft C, or it has tomake one twenty-fourth of a revolution, giving a purchase ofAtwenty-four to one; If the pinion I has nine, and the pinion H elevencogs, the numberof revolutions of the pinion I for each revo lntion vofthe shaft C is equal to Vlg, and the pinion H advance gXll :18% cogs foreach revolution ofthe shaft,

and consequently the drum has to advance one-thirdv of a cog or onefifty-fourth of a revolution for each revolution of the shaft, giving apurchase of fifty-fourto one.

From these examples it will 'be Areadily understood that by a slightchange in the proportion of the gears a hoisting apparatus can be madewith any desired purchase. The apparatus is very simple in itsconstruction, easily put up, and it is applicable to a great manydifferent purposes.

In Figures 3 and 4 I have represented my hoisting apparatus inconnection with a steam engine, and in -this case the crank-shaft C maybe made to extend only partially through the drum, with a bearing in onehead only.

In Figures 5 and 6 a hoisting apparatus is represented, which isconstructed like that shown in gs. 1 and 2, but arranged to be operatedby a belt and pulleys.

In Figures 7 and 8 I have shown my invention in its application to ahand-hoisting machine, and in this case the stationary gear E is notrigidly attached to the frame A, but it is held by means of abrake-wheel and lever,- and by releasing the brake-wheel the gear E isreleased, and the drum D is free to turn back.

In Figures 9 and 10a similar apparatus is shown, which is intendedparticularly for a truck-holster. In this ege the stationary gear isreleased by. a vspring-lerer or clutch, so that the drum can be allowedto turn back or `arrested at any desired moment.

Figures 11 and 12 show the application of myinvention toa crane, and inthis'case the drum D is provided with two or more different speeds whichconnect in such a manner that the hoisting-rope or chain can be readilychanged from one to the other, according' to the power required.

Figure 13 represents a longitudinal central section of the internai gearof my hoisting apparatus. While in figs. 1 and 2 bevel-gears are used,the gears used in g. 13 are dat, and the drum is madewith two speeds, asin gs. 11 and 12.

The same apparatus is also applicable as a power-gear for turn-tables,draw-bridges, turning-lathes, and

other machines Where great force is to be exerted with a comparativelysmall expenditure of power. In these cases the drum D will be replacedhy a cog-wheel or pulley, with an internal gear to mesh into the pinionH, or the internal gear K may be secured to a shaft, which serves totransmit the motion.

What I claim as new, and desire to secure by Letters Patent, isl Thecrank-shaft C, carrying pinions or cog-wheels H I, in combination withthe gear E and internal gear K, all. constructed and operatingsubstantially as and for the purpose set forth.

J. F. noel-low.-

i Witnesses:

W. HAUFF, RUDOLPH Wiisrn.

